TY - GEN
T1 - Terahertz wavefront control by graphene metasurface
AU - Yatooshi, Takumi
AU - Ishikawa, Atsushi
AU - Tsuruta, Kenji
N1 - Publisher Copyright:
© 2015 Materials Research Society.
Copyright:
Copyright 2017 Elsevier B.V., All rights reserved.
PY - 2015
Y1 - 2015
N2 - We propose and numerically investigate a tunable metasurface made of an array of graphene ribbons to dynamically control terahertz (THz) wavefront. The metasurface consists of graphene micro ribbons on a silver mirror with a SiO2 gap layer. The graphene ribbons are designed to exhibit localized plasmon resonances depending on their Fermi levels to introduce abrupt phase shifts along the metasurface. With interference of the Fabry-Perot resonances in the SiO2 layer, phase shift through the system is largely accumulated, covering up to 2jt range for full control of the THz wavefront. Numerical simulations prove that wide-angle reflected THz beam steering from -53° to +53° with a high reflection efficiency as high as 60% is achieved at 5 THz while the propagation direction of THz beam could be switched within 0.6 ps.
AB - We propose and numerically investigate a tunable metasurface made of an array of graphene ribbons to dynamically control terahertz (THz) wavefront. The metasurface consists of graphene micro ribbons on a silver mirror with a SiO2 gap layer. The graphene ribbons are designed to exhibit localized plasmon resonances depending on their Fermi levels to introduce abrupt phase shifts along the metasurface. With interference of the Fabry-Perot resonances in the SiO2 layer, phase shift through the system is largely accumulated, covering up to 2jt range for full control of the THz wavefront. Numerical simulations prove that wide-angle reflected THz beam steering from -53° to +53° with a high reflection efficiency as high as 60% is achieved at 5 THz while the propagation direction of THz beam could be switched within 0.6 ps.
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U2 - 10.1557/opl.2015.730
DO - 10.1557/opl.2015.730
M3 - Conference contribution
AN - SCOPUS:84985990683
T3 - Materials Research Society Symposium Proceedings
SP - 37
EP - 42
BT - Light-Matter Phenomena - From Atoms to Complex Structures
A2 - Budker, Dimitry
A2 - Ferry, Vivian
A2 - Caldwell, Joshua
A2 - Meriles, Carlos
A2 - Stavenga, Doekele
A2 - Millstone, Jill
A2 - Nesladek, Milos
A2 - Silva, Carlos
A2 - Tang, Ming Lee
A2 - Zollfrank, Cordt
A2 - Bartl, Michael
A2 - Christiansen, Silke
A2 - Giebink, Noel
A2 - Kena-Cohen, Stephane
A2 - Jelezko, Fedor
A2 - Shvets, Gennady
A2 - Stingelin, Natalie
A2 - Yang, Joel
A2 - Larouche, Stephane
PB - Materials Research Society
T2 - 2015 MRS Spring Meeting
Y2 - 6 April 2015 through 10 April 2015
ER -